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Articles 1 - 6 of 6
Full-Text Articles in Structures and Materials
Determination Of Chemical Notch, KChem On Aluminum And Steel When Subjected Under Slow Strain Rate Test In Corrosive Environment, Joshua Teo Lee Kuok
Determination Of Chemical Notch, KChem On Aluminum And Steel When Subjected Under Slow Strain Rate Test In Corrosive Environment, Joshua Teo Lee Kuok
Masters Theses
When designing for any mechanical components or system, the question would arise as to how the material would react to the loads subjected on it? Would the component survive its service load? How would it react to environmental corrosion? To answer these questions, the technique used in this thesis paper is the Slow Strain Rate Test (SSRT) method. Aluminum and steel were chosen as the material to be tested in this paper. Al 7075-T651, and Al 6061-T651 was chosen due to its wide range of application, high strength to weight ratio and ease of machinability. It is highly used in …
Cubesat Adcs Validation And Testing Apparatus, Jacob Stevens
Cubesat Adcs Validation And Testing Apparatus, Jacob Stevens
Honors Theses
The WALI team at Western Michigan University requested a test environment to validate their CubeSat’s de-tumbling control system and hardware. The test environment required a Helmholtz cage and spherical air bearing. The Helmholtz cage provides an adjustable magnetic field to simulate low earth orbit; the spherical air bearing simulates the friction free environment the CubeSat will experience in space. In conjunction, the two components create an adjustable system that simulates a satellite in low earth orbit.
Global Skin Friction Diagnostics: The Glof Technique And Measurements Of Complex Separated Flows, Sudesh A. Woodiga
Global Skin Friction Diagnostics: The Glof Technique And Measurements Of Complex Separated Flows, Sudesh A. Woodiga
Dissertations
This work describes the application of the global luminescent oil film skin friction meter to quantitative global skin friction diagnostics of complex separated flows. The development of this technique is based on the relationship between the oil film thickness and luminescent intensity of a luminescent oil film. The projected thin oil film equation is given to relate the normalized luminescent intensity with skin friction. The variational formulation with a smoothness constraint on skin friction is proposed to obtain a snap shot solution from two consecutive images for a relative skin friction field. A complete skin friction field is reconstructed through …
Global Skin Friction Diagnostics In Complex Separated Flows, Sudesh A. Woodiga
Global Skin Friction Diagnostics In Complex Separated Flows, Sudesh A. Woodiga
Masters Theses
This work describes the application of a global luminescent oil film skin friction meter to quantitative global skin friction diagnostics in complex separated flows. The development of this technique is based on the relationship between the oil film thickness and luminescent intensity of an oil film mixed with a luminescent dye. The projected thin oil film equation is given to relate the normalized luminescent intensity with skin friction. The basis for this technique is the variational solution for the thin oil film equation on the image plane. The variational formulation with a smoothness constraint on skin friction is proposed to …
Numerical Studies Of Transition For Flows Around Multi-Element Airfoils, Fengjun Liu
Numerical Studies Of Transition For Flows Around Multi-Element Airfoils, Fengjun Liu
Dissertations
The transition of flows around a multi-element airfoil has been numerically studied using RANS with a k - e two-equation transition model, LST and DNS. The transition model uses an effective eddy-viscosity by coupling an intermittence-like correction to a turbulence eddy-viscosity that can be obtained via solving a parent k - e turbulence model. The transition model is truly predictive in that it is able to predict transition onset locations without having to specify prior knowledge of the targeted transition process. The predicted transition onset locations for all the cases studied were compared with the measured data. The results suggest …
The Pratt & Whitney 4060: Power For The Future, Gregory Sumner
The Pratt & Whitney 4060: Power For The Future, Gregory Sumner
Honors Theses
The Pratt & Whitney 4000 engine platform is considered the most economical turbofan engine in its class. It is advertised as providing the most efficient service and the most reliability for air carriers. United Airlines utilizes the company's engines. The paper begins with basic turbine engine theory and moves on to engine classifications, where the Pratt & Whitney 4060 is introduced. The systems are covered in detail. Maintenance areas of service and inspections are described to show how personnel may interact with the computers. Finally, a description of activities during the author's internship describe the interesting facets of a semester …